Center Differential Fluid for 4000q

[Per Lindgren]

I bought a pump for this, from the FLAPS. The pump has a hose at the
end, stick the hose into the bottle, pull the handle, stick the hose
into the filler hole, and push the oil in. It works like a giant
syringe! Takes about 1/2 quart at a time. With this one, you dont need a
lift. Fill the tranny until the oil is level with the filler hole.

PerL
87 Cq

EricNMN at aol.com wrote:

>In my '86 4k Quattro, the fill plug was fairly evident.  It uses a 17mm hex head as I recall.  I think there were two drain plugs or two fill plugs for the transmission/center diff.  The center differential and transmission use the same fluid reservoir.
>
>Another list member made a suggestion recently - remove the fill plug first.  That way, if the drain plug won't come out, just re-install the fill plug.  BUT, if you remove the drain plug first and can't get the fill plug out, you have a problem.
>
>A few more recommendations:
>
>Use a lift - I did mine in the driveway and cursed the lack of space.
>Wear clothes you can throw out.  Gear oil has a strong/unique odor.
>Use a synthetic gear oil.  I SUSPECT you need GL-4 75W-90.  Confirm this before you purchase.
>Use a pump to fill.  There is not a lot (NONE AT ALL) of room to tilt the bottle when you fill the case.
>
>Eric Schumacher
>96 A4 Quattro
>86 4kCSQ (deceased)
>
>Is there a filler plug for the center differential on the 4000 quattro?  The drain plug is evident on the bottom.  I have heard different stories that there is and also that it is filled through the transmission?  I dont want to drain it until I know for sure where to fill it.  If there is a filler do you have to remove the cat converter to see it?  Also what is the correct fluid?
>If its filled through the Tranny you have to use a synthetic correct?  The Bentley book isnt that clear as to the diff. fluid for quattro versus front wheel drive.  Any help is greatly appreciated.
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